Instructions / Assembly

12
3/4" Check Valve with 1/8" Hole
Pressure Gauge
Hot water line
Cold water line
3/4" Shut-Off Valve (Typ.)
Gas Line
3/4" cold water supply
Heat Trap 6” Min.
3/4" Shut-Off Valve (Typ.)
2 Gallon Thermal Expansion Tank (if required-not supplied with water heater)
3/4" Shut- Off Valve (Typ.)
3/4" Tempered domestic hot water supply to house.
Minimum of 2'-0" developed length
of 3/4" type "L" copper from the
water heater connection.
Nominal 3/4" size mixing or tempering valve (refer to warning above). Follow mixing or tempering valve manufacturer’s instructions for installation of the valve.
Isolation valve in hot water
supply line to heating unit (not
supplied with water heater)
See diagrams above for proper
pipe application for vertical
or horizontal supply lines.
Temperature and Pressure Relief Valve, tie to location approved by local code
Temperature and pressure relief valve discharge line
140°F (60°C)
120°F (49°C) to
130°F (54°C)
Water Heater drain pan installed in accordance with the Local and State Code
6” Air Gap
Isolation valve in
cold water return
line from heating
unit (not supplied
with water heater)
Drain valve
(not supplied
with water
heater)
Air vent
3/4" HWS & HWR
to Heating Coil.
Water Heater drain pan installed
in accordance with the Local
and State Code
Air Handler
T
FAN
ON
OFF
HEAT
COOL
To HVAC Unit.
Piping loop between water heater and fan coil shall be flow guard gold CPVC or equal
Hot water to space heater
Hot water coil
All bronze pump
Check valve internal in pump
Air bleed valve
Water Sample Tap
TYPICAL PIPING DIAGRAM FOR COMBINATION POTABLE/SPACE HEATING INSTALLATION
Flow Control
Valve
INSTALLATION